
From this equation, we can observe that the astrophysical configuration withdraws the isotropic pressure condition unless all the terms on the right-hand-side get canceled. Unlike Eq.(28) in [1]}, here the anisotropy factor \(\Pi \)  depends on \(f(R)\)  corrections terms (third and sixth term on the right hand side) which signifies that even if all the quantities vanish, the effects of gravity modification would still be present affecting the anisotropic factor.
